Mr Foster said the bridge was designed to have the "delicacy of a butterfly".
"A work of man must fuse with nature. The pillars had to look almost organic, like they had grown from the earth," the world-renowned British architect said in an interview with regional daily newspaper Midi Libre.
Like Concorde and the Channel Tunnel, the bridge is Franco-British. French construction group Eiffage - that built the Eiffel Tower - financed the project in return for the right to collect receipts from a bridge toll for 75 years.
The bridge is now a source of pride for Millau, which believes many more tourists will come to admire one of the engineering wonders of the 21st Century, our correspondent says.
The construction also removes a bottleneck at the town, completing a new motorway link between Paris and the Mediterranean.
The construction of the steel bridge - now weighing about 36,000 tonnes - began in December 2001, using innovative techniques.
From the north and south sides of the valley, the metal sections of the structure were assembled, lifted slightly and then carefully slotted into place on each of the supporting pillars. Motorists are expected to pay 4.6 euros (£3.18; $5.60) for a trip across the bridge.
Proud to be an American
Not blind. Not uninformed. We are party to atrocities. But the response of the world after 9/11 is worth noting. Even our most dire enemies offered aid. We should all be so lucky.
I've been on The Royal Gorge Bridge in Colorado. (Photo here) It's 1053 feet above the valley below, although I'm not certain if that's the top of the towers, or the bridge surface. When I was there (back in 1978), there was a sign on the middle of the bridge reading, "No fishing from bridge".
Not really, because I heard that you can't see anything on it.
Kinda right. I saw it on the news today and the barriers on the sides are quite high (enough to obstruct the view from a regular sized car), but on a really cloudy day, it still might feel like a flight. I wish I can drive on that bridge someday!
gosh! that looks awesome. which part of france is in?? i heard it was in the south. came out in the singapore papers.
RIDING THE 3AM ROLLERCOASTER
Anastasia Myskina my NO.1 favourite.
Daniela Hantuchova super eyecandy!
Emilie Loit heartbreaker.
Alize Cornet she's just 15!
Elena Dementieva pretty!
Amelie Mauresmo idol!
Svetlana Kuznetsova so fuckable! ps. She was never ugly!!
All the best to:
Nathalie Dechy, Caroline Wozniacki, Justine Henin-Hardenne,
Maria Sharapova, Ana Ivanovic, Maria Kirilenko,
Marion Bartoli, Aravane Rezai, Dinara Safina,
Victoria Azarenka, Olga Poutchkova and all the other pretty players!
I like these players because they are HAWT HAWT HAWT!